Source @ github

Math.sign

sign — Check if the number is positive, negative or zero.

Description

Math.sign(number number)

Parameters

Name Description Type Default Optional
number number No

Return values

mixed. Integer (1, 0, -0, 1) for numbers or NaN for non number input.

Changelog

Version Description
ES 6 Introduced.

Examples

Example #1 – sign example
console.log(Math.sign(10));        // 1
console.log(Math.sign(0));         // 0
console.log(Math.sign(-5));        // -1
console.log(Math.sign(-0));        // -0
console.log(Math.sign('8'));       // 1
console.log(Math.sign('string'));  // NaN

External references